/Engine/Plugins/EnhancedInput/Source/EnhancedInput/Public/EnhancedInputSubsystemInterface.h
Removes player mapped key in the first KeySlot for mapping of MappingName. Requests a rebuild of the player mappings.
The number of mappings that have been removed
virtual int32 RemovePlayerMappedKey ( const [FName](API\Runtime\Core\UObject\FName) MappingName, const [FModifyContextOptions](API\Plugins\EnhancedInput\FModifyContextOptions) & Options )